TOPICS COVERED:

1. Motion Blur
2. Depth Of Field

Download the scene here

Global Switches

Disable default lights. Leave everything else default.

Global Illumination and Irradiance Map

- Make sure GI is turned on
- Primary bounces set to Irradiance Map
- Secondary Bounces set to QMC
- Irradiance map preset set to Medium

V-Ray Environment

- GI Environment override is turned on and set to 1.0 and given a light yellow color

- Reflection/environment override is enable but it is not necessary for this particular scene

Camera Settings

- Check Specify Focus

- Under the Sampling rollout enable Depth of Field and Motion Blur by clicking the checkboxes.

- Enter a value for the subdivs (Higher values will take longer to render)

Note: Enabling DOF or Motion Blur will increase render times.

Top View

When using Depth Of Field you can adjust where or what you want the camera to focus on by changing the Specify Focus value.

Here I want the camera to focus on the torus knot. So, in the top viewport, I position the focus planes roughly in the center of the torus knot object.

Rendered View

As you can see, the torus knot is in focus and the more distant objects in the scene slowly fall out of focus.

Top View

Now lets change the area of interest to one of the center cylinders.

To do this you simply increase the Specify Focus value so that the focus planes are close to the object/objects you want to focus on.

Rendered View

As you can see, the torus knot is now blurred and the central cylinder is in focus.

Note: you can animate the Specify Focus spinner. Just know that with DOF enabled you may be looking at some high render times